Strength Analysis of a Large-Size Supporting Structure for an Offshore Wind Turbine

Niklas, Karol

doi:10.1515/pomr-2017-0034

Cited by 12 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Gravity foundations for OWTs are usually used at water depths of up to 25 m. A reasonable concept for a gravitationaltype foundation intended for waters with a depth of up to 40 m, including numerical analysis, has been proposed by Niklas [22].…”

Section: Gravity Foundationsmentioning

confidence: 99%

Short Review and 3-D FEM Analysis of Basic Types of Foundation for Offshore Wind Turbines

Iwicki

Przewłócki

2020

Polish Maritime Research

View full text Add to dashboard Cite

Some problems of the foundations of offshore wind turbines are considered in this paper. A short review is presented on the two basic types of foundations, i.e. monopiles and gravity foundations, including their basic features and applications as well as general design considerations. Also, some issues regarding analysis are discussed, including geotechnical problems and modelling techniques. A numerical model of offshores turbine and some preliminary computations are presented. Finite element analysis was carried out for wind turbines supported on both gravity and monopile foundations. The wind turbine tower, blades (simplified model), gravity foundation and part of the surrounding soil are included in the model. The turbine was loaded by wind and loads induced by waves, inertia and gravity. Both non-linear static and dynamic analysis of the wind turbine was performed. The displacements and stresses under the tower foundations were calculated and a comparison analysis carried out.

show abstract

Section: Gravity Foundationsmentioning

confidence: 99%

Short Review and 3-D FEM Analysis of Basic Types of Foundation for Offshore Wind Turbines

Iwicki

Przewłócki

2020

Polish Maritime Research

View full text Add to dashboard Cite

show abstract

“…Despite the developments regarding the floating offshore wind turbines (FOWTs), various effective technical and numerical simulations supported by experimental tests solutions as well as numerous technological progress in the fields of construction, installation, and maintenance of such foundations are still required. 4,5 Floating support platforms used in offshore wind energy industry are classified differently from bottom-fixed foundations based on the main approach that is used to achieve static stability requirements, that is, these platforms must provide enough buoyancy and rotational stability to prevent the system from capsizing. Three basic categories based on the contributions of the second moment of the waterplane area, ''waterplane (buoyancy) stabilized floating platforms''; the relative position of the center of buoyancy (CoB) and the center of gravity (CoG), ''ballast stabilized floating platforms''; and mooring system, ''mooring stabilized floating platforms'' on fulfilling the stability mechanism are proposed.…”

Section: Introductionmentioning

confidence: 99%

“…However, the significant amount of wind resources available in water depths greater than 50 m has led the trend of offshore wind power industry development toward deeper waters. 4,5 Moreover, the steadier and more energetic winds, as well as less visual intrusion and noise emissions which lead not only to more electricity generated per square meter of swept rotor area but also larger wind turbines and hence more overall installed capacity per unit area, are another advantages of offshore wind turbines (OWTs). 6 Consequently, for much deeper regions, exceeding 50 m, the floating support platforms anchored to the seabed by mooring lines system mostly developed based on the offshore oil and gas offshore industry were proposed.…”

Section: Introductionmentioning

confidence: 99%

Effects of motion and structural vibration–induced loadings on the coupled dynamic response of a mono-column tension-leg-platform floating wind turbine

Imani

Abbaspour

Tabeshpour

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part M:

View full text Add to dashboard Cite

Floating wind turbines are subjected to highly dynamic and complicated environmental conditions leading to significant platform motions and structural vibrations during operation and survival conditions. These motions and vibrations alter the induced loading characteristics; and consequently, affect the dynamic behavior of the system. In order to better understand the influence of such motions and structural vibrations, herein elastic structural disturbance of tower, on the system behavior, the spectral and statistical characteristics of a floating wind turbine dynamic responses under operational and survival conditions are fully explored using a fully coupled aero-hydro-servo-multi-rigid-flexible-body model. The spectral comparison results showed the important role of aerodynamic damping in reducing the high-frequency resonant responses in operational conditions. These analyses also revealed the effects of tower elasticity in shifting and amplifying high-frequency resonant responses. The statistical comparison results showed that the mean values of the responses are dominated by wind loads and the maximum and standard deviations of the responses are mainly induced by the combination of support platform motions and wave loads. It was also shown that elastic structural deformation of tower enlarges the statistical characteristics of the responses, especially when the system is subjected to both wind and wave loadings.

show abstract

“…However the analysis on the structure of LD-VAWT is little and it does not build a perfect set of designing plan and methods yet. Therefore, this paper will search on the static and dynamic mechanical properties of structure based on a small-scale lift-type vertical axis wind turbine [13][14][15][16][17][18][19][20][21] and propose a set of suitable research plans and methods as references to other kinds of LD-VAWTs and vertical axis wind turbines.…”

Section: Introductionmentioning

confidence: 99%

Static Mechanical Properties and Modal Analysis of a Kind of Lift-Drag Combined-Type Vertical Axis Wind Turbine

Feng

Zhao

et al. 2018

International Journal of Rotating Machinery

View full text Add to dashboard Cite

In order to explore a set of methods to analyze the structure of Lift-Drag Combined-Type Vertical Axis Wind Turbine (LD-VAWT), a small LD-VAWT was designed according to the corresponding Standards and General Design Requirements for small vertical axis wind turbines. The finite element method was used to calculate and analyze the static mechanical properties and modalities of main parts of a kind of small-scale LD-VAWT. The contours of corresponding stress and displacement were obtained, and first six-order mode vibration profiles of main parts were also obtained. The results show that the main structure parts of LD-VAWT meet the design requirements in the working condition of the rated speed. Furthermore, the resonances of all main parts did not occur during operation in the simulations. The prototype LD-VAWT was made based on the analysis and simulation results in this study and operated steadily. The methods used in this study can be used as a reference for the static mechanical properties and modal analysis of vertical axis wind turbine.

show abstract

Strength Analysis of a Large-Size Supporting Structure for an Offshore Wind Turbine

Abstract: The offshore wind power industry is the branch of electric energy production from renewable sources which is most intensively developed in EU countries

Cited by 12 publications

References 39 publications

Short Review and 3-D FEM Analysis of Basic Types of Foundation for Offshore Wind Turbines

Short Review and 3-D FEM Analysis of Basic Types of Foundation for Offshore Wind Turbines

Effects of motion and structural vibration–induced loadings on the coupled dynamic response of a mono-column tension-leg-platform floating wind turbine

Static Mechanical Properties and Modal Analysis of a Kind of Lift-Drag Combined-Type Vertical Axis Wind Turbine

Contact Info

Product

Resources

About